A steel pipe has a cross-sectional area of $127.20$ in $^2$ at $25{\degree} \mathrm{F}$. Calculate its crosssectional area when the pipe is heated to $175{\degree} \mathrm{F}$ .

Calculate the increase in length of a zinc rod $50.0 \mathrm{~m}$ long at $15.0{\degree} \mathrm{C}$ when it is heated to $130.0{\degree} \mathrm{C}$.

What must the water pressure be to supply water to the third floor of a building (35.0 $\mathrm{ft}$ up) with a pressure of $40.0 \mathrm{lb} / \mathrm{in}^2$ at that level?

Every morning Shakira weighs herself on a bathroom spring scale. Today, the scale reads 134 lb. (a) Find its spring constant, if the spring in the bathroom scale compresses $0.752$ in.. (b) If her husband steps on the scale and the spring compresses $1.13$ in., how much does he weigh? (c) Why is there a limit to how much weight a spring scale can measure?

A $42.0\mathrm{~lb}$ piece of steel at $670{\degree} \mathrm{F}$ is dropped into $100 \mathrm{~lb}$ of water at $75.0{\degree} \mathrm{F}$. Find the final temperature of the mixture.

Find the total force exerted by the water against the bottom of the swimming pool shown in given figure, assuming it is full of water.

A tanker truck with a cylindrical container $11.3 \mathrm{~m}$ long and $2.85 \mathrm{~m}$ in diameter transports several types of liquids. How much mass does it carry if it is transporting a full load of (a) water, (b) oil, and (c) gasoline?

(a) Calculate the total force on the bottom of a water-filled circular cattle tank $0.750 \mathrm{~m}$ high with radius $1.30 \mathrm{~m}$ where the weight density of water is $98 \overline{00} \mathrm{~N} / \mathrm{m}^3$. (b) Find the total force on the side of the tank.

A geosynchronous communication satellite orbits at a fixed point above the earth's surface. The earth takes $24.0 \mathrm{~h}$ to rotate on its axis. (a) Calculate the communication satellite's orbiting altitude from the center of the earth and from the surface of the earth. (b) Calculate its linear speed.

(a) What amount of power does a motorcycle need to produce $72.0 \mathrm{lb} \mathrm{ft}$ of torque while the engine crankshaft rotates at $30 \overline{0} 0$ rpm? (b) When shifted into a higher gear, the same amount of power rotates the engine crankshaft at 5000 rpm. What amount of torque does the engine produce in this higher gear? (c) Using your knowledge of power, torque, and angular speed, describe why a motorcycle should be in a low gear when climbing a steep hill.

A block of copper is heated from $20.0{\degree} \mathrm{C}$ to $80.0{\degree} \mathrm{C}$. Determine the heat absorbed by the copper if its mass is $60.0 \mathrm{~g}$ .

Determine the heat flow in $15 \mathrm{~min}$ through a $0.10-\mathrm{cm}$-thick copper plate with crosssectional area $150 \mathrm{~cm}^2$ if the temperature of the hot side is $990{\degree} \mathrm{C}$ and the temperature of the cool side is $5{\degree} \mathrm{C}$.

Calculate the joules of heat which are absorbed by an electric freezer in lowering the temperature of $1850 \mathrm{~g}$ of water from $80.0{\degree} \mathrm{C}$ to $10.0{\degree} \mathrm{C}$ .

Determine the thermal conductivity of a piece of building material $0.25 \mathrm{~in}$. thick that has an $R$ value of $1.6 \mathrm{~ft}^2{ }{\degree} \mathrm{F} / \mathrm{Btu} / \mathrm{h}$.